. >>> more possible fallout tonight from the david petraeus sex scandal. >> revelations of the affair already cost him his job and now a promotion is on hold for the top u.s. general in afghanistan. >> investigators now combing through his e-mail communications with the tampa socialite who prompted the investigation that forced david petraeus to resign. danielle nottingham brings us the latest. >> reporter: the pieces are slowly coming together. and lawmakers here on capitol hill are concerned the fallout will interfere with their investigation into the deadly attack in benghazi, libya. the pentagon is investigating general john allen, the top u.s. commander in afghanistan. in connection with the scandal that took down cia director david petraeus. >> general allen is entitled to due process in this matter. >> reporter: the fbi gave the penalty gone more than 20,000 pages of -- pentagon more than 20,000 pages of e-mail communication with allen and tampa socialite jill kelley. she went to the fbi with anonymous threatening e-mails and agents traced those to paula broadwell and uncovered